Warm up those arms and feel good about it, too. The Canari Susan G. Komen arm warmers are plenty toasty for colder days, and with their unisex sizing both men and women can proudly show support for the Susan G. Komen foundation.

They are SUPER-WARM! It feels like your arms are getting a hug! But I have thin, southern California skin where the winter weather drops to the low 40s at it's worst in the mornings. (I saw it go to 37 degrees only once in my 30 years here.) I'm a shirt/jersey size large but I wasn't sure what size my arms are and ordered the mediums. My arms are 11.75" around the bicep. With that being said, they felt kind of tight on my upper arms like they might cut off the circulation after a while, but I didn't wear them long enough to see if my hands went numb or not. They also seem a little on the long side, but I'd rather have them too long than too short. I gave them to my brother instead of paying the shipping charge to exchange them for large.

I'll definitely pick up some large ones for next winter pre-dawn rides...

These are the best arm warmers I've had. I contemplated ordering mediums because my arms are on the longer side but went with the smalls. While riding, they stay in place perfectly but yet don't pinch.

These are my favorite arm warmers. They are a good weight for warmth and a soft fleece material on the inside. I originally purchased the large but had to return them for a medium (as usual with Canari products, they run a little bigger than Pearl and others). I am 5'7", 140 lbs - my arms are "normal" size, not toothpicks for sure but not muscled-bound either, and these stay up perfectly. I actually ordered two more pair when they went on sale so I have them if/when these wear out and when I ride on consecutive days in the cold weather! The pink ribbon is also cool, since I have a sister with breast cancer.

These arm warmers are my first - I've always just worn long-sleeved jerseys but decided to jump on these because they were such a great deal. So far I've worn them on the bike as well as for running. They're warm, fit snug, but are also stretchy enough to pull down over my knuckles while running. Easy to slide off while on the bike. I'm glad I bought these - they'll come in handy this winter for sure!